Tower plate structure of ultra-large rectifying tower

Abstract

The utility model discloses a tower plate structure of an ultra-large rectifying tower, belongs to the technical field of industrial equipment, and aims to provide a tower plate structure of an ultra-large rectifying tower with conveniently controllable temperatures at different heights in a tower body, the tower plate structure comprises a heating disc, a convection channel is formed in the center of the heating disc, and a hot area temperature sensor is fixedly connected to the upper surface of the heating disc; an electric heating disc is arranged at the bottom of the heated disc, a positioning steel ring is fixedly connected to the edge of the heated disc, a heat insulation disc is fixedly connected to the bottom of the positioning steel ring, a clamping channel is formed in the center of the heat insulation disc, a condensation pipe is arranged on the bottom face of the heat insulation disc, and a cold area temperature sensor is fixedly connected to the lower surface of the heat insulation disc. The heating parts are arranged in the interlayers of the tower plates, the temperature sensors are arranged on the top surfaces of the tower plates, and the condensation pipes and the temperature sensors are arranged on the bottom surfaces of the tower plates, so that the temperatures at different heights of the rectifying tower are known and controllable, and high-precision rectifying operation can be carried out without carrying out large-scale debugging on the rectifying tower.

Description

Technical Field

[0001] This application relates to the field of industrial equipment technology, and in particular to a tray structure for an ultra-large distillation column. Background Technology

[0002] Distillation columns separate light and heavy components in the feed through the partitioning effect of trays. Since the reboiler is located at the bottom of the column, the temperature decreases as you go up in the column. However, the temperature above and below each tray is unknown and uncontrollable. Therefore, it is necessary to install heat insulation structures on the side walls of the column to keep the temperature inside the column relatively stable. However, this stability requires a lot of testing and correction to achieve, so it is quite complicated to operate. Summary of the Invention

[0003] The purpose of this application is to provide a tray structure for an ultra-large distillation column with convenient and controllable temperature at different heights inside the column.

[0004] To achieve the above objectives, this application provides a tray structure for an ultra-large distillation column: including a heating tray, a convection channel in the center of the heating tray, a hot zone temperature sensor fixedly connected to the upper surface of the heating tray, an electric heating plate at the bottom of the heating tray, a positioning steel ring fixedly connected to the edge of the heating tray, a heat insulation plate fixedly connected to the bottom of the positioning steel ring, a snap-fit ​​channel in the center of the heat insulation plate communicating with the convection channel, a condenser tube on the bottom surface of the heat insulation plate, and a cold zone temperature sensor fixedly connected to the lower surface of the heat insulation plate, forming a negative feedback system with the heat exchange components.

[0005] As a preferred embodiment, the heating plate includes several parallel latitudinal extension rods, with longitudinal extension rods connecting the ends of adjacent latitudinal extension rods. A heat-conducting clamp is fixedly connected to the lower surface of the heating plate, and a straight slot is provided at the bottom of the heat-conducting clamp to engage with the latitudinal extension rods, thus combining heat conduction and installation constraint functions.

[0006] As a preferred embodiment, the positioning steel ring has several connecting holes that penetrate the inner and outer side walls, and the heating plate has two ends, each extending through one of the connecting holes to the outside of the positioning steel ring for connection with the positive and negative poles of the power supply line.

[0007] As a preferred embodiment, the inner wall of the positioning steel ring is fixedly connected with a number of reinforcing rings, the number of which corresponds to the number of connecting holes, with one reinforcing ring surrounding one connecting hole, in order to improve the structural strength of the positioning steel ring.

[0008] As a preferred embodiment, the lower surface of the heating plate has a reinforcing frame surrounding the convection channel, the reinforcing frame being adapted to be inserted into the snap-fit ​​channel, so that the fit between the heating plate and the insulation plate is tighter and more stable.

[0009] As a preferred embodiment, the inner wall of the snap-fit ​​channel has a limiting frame plate, which is suitable for close contact with the lower end of the reinforcing frame. The outer side of the reinforcing frame is in close contact with the inner wall of the snap-fit ​​channel, so that the heat insulation plate provides an additional support to the center of the heat-receiving plate, thereby suppressing the deformation of the heat-receiving plate due to liquid pressure.

[0010] As a preferred embodiment, the lower surface edge of the heat insulation plate has a plug-in plate and a constraint plate. The plug-in plate has a pair of through holes for the liquid inlet and liquid outlet of the condenser tube to pass through. The inner side of the constraint plate has an arc groove, which is suitable for engaging with the condenser tube, constraining the condenser tube, and ensuring installation stability.

[0011] As a preferred embodiment, the upper surface edge of the heat insulation plate is provided with a fitting annular groove, which is suitable for fitting with the lower end of the positioning steel ring, thereby reducing the deformation and relative movement of the positioning steel ring edge.

[0012] Compared with the prior art, the beneficial effects of this application are as follows:

[0013] (1) By setting heating components in the partition of the tray and setting temperature sensors on the top surface of the tray, and setting condenser tubes and temperature sensors on the bottom surface of the tray, the temperature at different heights inside the distillation column is known and controllable. High-precision distillation can be carried out without extensive testing and debugging of the distillation column, making the use of the distillation column more convenient.

[0014] (2) By separating the heating plate from the condenser tube, the mutual influence between heating and condensation is reduced, and the temperature at different heights inside the distillation column can be precisely and stably controlled through negative feedback regulation, so that different components in the raw material can be separated more efficiently, and the purity of each component after separation will be higher. Attached Figure Description

[0015] Figure 1 This is a first three-dimensional schematic diagram of the tray structure of the ultra-large distillation column.

[0016] Figure 2 This is a second three-dimensional schematic diagram of the tray structure of the ultra-large distillation column.

[0017] Figure 3 This is a three-dimensional structural diagram of the connection between the heating plate and the positioning steel ring in the tray structure of this ultra-large distillation column.

[0018] Figure 4This is a schematic diagram of the first three-dimensional structure of the tray structure of the ultra-large distillation column, showing the cooperation between the heated plate and the positioning steel ring.

[0019] Figure 5 This is a schematic diagram of the second three-dimensional structure of the tray structure of the ultra-large distillation column, showing the cooperation between the heated plate and the positioning steel ring.

[0020] Figure 6 This is a three-dimensional structural diagram of the heating plate and positioning steel ring of the tray structure of this ultra-large distillation column.

[0021] Figure 7 This is a three-dimensional structural diagram of the heat-insulating tray of the ultra-large distillation column.

[0022] Figure 8 A three-dimensional schematic diagram of the temperature sensor for the cold zone of the tray structure of this ultra-large distillation column, configured on the heat-insulating plate.

[0023] In the diagram: 1. Heating plate; 101. Convection channel; 102. Reinforcing frame; 103. Heat-conducting clamp; 104. Straight slot; 2. Positioning steel ring; 201. Connecting hole; 202. Reinforcing ring; 3. Heating plate; 301. Weft extension rod; 302. Warp extension rod; 4. Condenser tube; 5. Insulation plate; 501. Snap-fit ​​channel; 502. Limiting frame plate; 503. Insertion plate; 504. Constraint clamp plate; 505. Fitting ring groove; 506. Through hole; 507. Arc slot; 6. Hot zone temperature sensor; 7. Cold zone temperature sensor. Detailed Implementation

[0024] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0026] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0028] like Figure 1-8 The tray structure of the ultra-large distillation column shown includes a circular heating plate 1 with a rectangular convection channel 101 in the center. A hot zone temperature sensor 6 is fixedly connected to the upper surface of the heating plate 1, submerged below the liquid surface of the liquid feedstock, mainly used to detect the temperature of the liquid phase. An electric heating plate 3 is installed at the bottom of the heating plate 1, mainly used to heat the liquid feedstock, causing the low-boiling-point components to convert into gaseous components and collect upwards. The electric heating plate 3 includes several parallel latitudinal extension bars 301, with longitudinal extension bars 302 connecting the ends of adjacent latitudinal extension bars 301. In this way, the power supply to the latitudinal extension bars 301 can be continuously obtained through the longitudinal extension bars 302, and the latitudinal extension bars 301... The staggered structure formed by the warp extension rod 301 and the weft extension rod 302 can also ensure that the heating plate 1 heats up evenly. A heat-conducting clamp 103 is fixedly connected to the lower surface of the heating plate 1. The heat-conducting clamp 103, like the heating plate 1, is made of an alloy material with good thermal conductivity, which can quickly transfer the heat generated by the electric heating plate 3 to the liquid raw material above the heating plate 1. A straight groove 104 is opened at the bottom of the heat-conducting clamp 103 for engaging with the weft extension rod 301. There are many heat-conducting clamps 103. These heat-conducting clamps 103 are parallel to each other and constrain multiple weft extension rods 301 respectively, so that the entire electric heating plate 3 has good installation stability.

[0029] A positioning steel ring 2 is fixedly connected to the edge of the heating plate 1 for direct contact and fixed connection with the inner wall of the distillation column. The positioning steel ring 2 has several connecting holes 201 that penetrate the inner and outer walls, allowing connecting structures such as rivets and bolts to pass through and be fixedly connected to the inner wall of the distillation column. The electric heating plate 3 has two ends, each of which extends out from a radial extension rod 302. Each of the two ends of the electric heating plate 3 extends out to the outside of the positioning steel ring 2 through a connecting hole 201 and is respectively connected to the two poles of the power supply line. Several reinforcing rings 202 are fixedly connected to the inner wall of the positioning steel ring 2. The reinforcing rings 202 are made of the same material as the positioning steel ring 2, which is corrosion-resistant steel. Therefore, the reinforcing rings 202 are usually fixedly connected to the positioning steel ring 2 by welding. The number of reinforcing rings 202 corresponds to the number of connecting holes 201, and one reinforcing ring 202 surrounds one connecting hole 201 to improve the structural strength around the connecting hole 201 of the positioning steel ring 2.

[0030] A heat insulation plate 5 is fixedly connected to the bottom of the positioning steel ring 2. This plate is typically made of a material with low thermal conductivity but high temperature resistance, such as ceramic fiber. A fitting annular groove 505 is formed on the upper edge of the heat insulation plate 5, which fits perfectly with the lower end of the positioning steel ring 2. Because the heat insulation plate 5 and the positioning steel ring 2 are made of different materials, they usually only contact each other without connecting. The heat insulation plate 5 rests on the support structure inside the distillation column to maintain its stability. To ensure that the pre-welded heating plate 1 and the positioning steel ring 2 can be smoothly fixed to the column wall of the distillation column, the positioning steel ring 2 is usually fixed first, then the heat insulation plate 5 is installed, and finally the support structure inside the distillation column is fixed. A snap-fit ​​channel 501 is formed in the center of the heat insulation plate 5, which communicates with the convection channel 101. The convection channel 101 is horizontal. The projection of the direction is completely located within the snap-fit ​​channel 501. The lower surface of the heating plate 1 has a reinforcing frame 102 surrounding the convection channel 101 to improve the structural strength of the edge of the convection channel 101. The reinforcing frame 102 is inserted into the snap-fit ​​channel 501, and the inner wall of the snap-fit ​​channel 501 has a limiting frame plate 502 to make close contact with the lower end of the reinforcing frame 102, providing a lifting force to the reinforcing frame 102. The outer side of the reinforcing frame 102 is in close contact with the inner wall of the snap-fit ​​channel 501 to form a sealing surface, which can prevent liquid and gaseous raw materials from entering the space enclosed by the heating plate 1, the heat insulation plate 5, and the positioning steel ring 2, and avoid the electric heating plate 3 from directly contacting the raw materials and causing violent evaporation expansion. The sealing structure can improve the safety and stability of the tower plate during operation.

[0031] The bottom surface of the heat insulation plate 5 is provided with a condenser tube 4, which is mainly used to contact the gaseous raw material, so that the gaseous raw material with a high freezing point releases heat and liquefies and collects downward. The lower surface edge of the heat insulation plate 5 has a plug-in plate 503 and a constraint plate 504. The plug-in plate 503 and the constraint plate 504 are located on opposite sides of the heat insulation plate 5. The plug-in plate 503 has a pair of through holes 506 for the liquid inlet end and liquid outlet end of the condenser tube 4 to pass through, thereby achieving constraint and fixation. The inner side of the constraint plate 504 has an arc groove 507, which is exactly engaged with the middle part of the reciprocatingly bent condenser tube 4. The lower surface of the heat insulation plate 5 is also fixedly connected with a cold zone temperature sensor 7, which is mainly used to detect the stability of the gaseous raw material.

[0032] Working principle: The heating plate 3 and condenser tube 4 installed in the tower plate can work simultaneously. The heating plate 3 is used to heat the liquid raw material above the heating plate 1. The temperature of the liquid raw material is sensed in real time by the hot zone temperature sensor 6. Under the control of the industrial computer, a negative feedback control balance is achieved, so that the temperature of the liquid raw material above the heating plate 1 can be maintained within a certain range. Cooling liquid is introduced into the condenser tube 4 to cool the gaseous raw material below the heat insulation plate 5. The temperature of the gaseous raw material is sensed in real time by the cold zone temperature sensor 7. Under the control of the industrial computer, another set of negative feedback control balance is achieved, so that the temperature of the liquid raw material below the heat insulation plate 5 can be maintained within a certain range.

[0033] Since there is more than one tray structure in the distillation column, there are usually many trays, and the temperature setpoints above and below the trays at different heights are different, showing a stepped change. The temperature control accuracy at different heights inside the distillation column is higher and more stable, which can improve the component separation efficiency and component purity during the distillation process.

[0034] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A tray structure for an ultra-large distillation column, characterized in that: The device includes a heating plate (1), a convection channel (101) in the center of the heating plate (1), a hot zone temperature sensor (6) fixedly connected to the upper surface of the heating plate (1), an electric heating plate (3) at the bottom of the heating plate (1), a positioning steel ring (2) fixedly connected to the edge of the heating plate (1), a heat insulation plate (5) fixedly connected to the bottom of the positioning steel ring (2), a snap-fit ​​channel (501) in the center of the heat insulation plate (5) communicating with the convection channel (101), a condenser tube (4) on the bottom surface of the heat insulation plate (5), and a cold zone temperature sensor (7) fixedly connected to the lower surface of the heat insulation plate (5).

2. The tray structure of the ultra-large distillation column as described in claim 1, characterized in that: The heating plate (3) includes several parallel latitudinal extension rods (301), and a longitudinal extension rod (302) is connected between the ends of adjacent latitudinal extension rods (301). A heat-conducting clamp (103) is fixedly connected to the lower surface of the heating plate (1). A straight groove (104) is provided at the bottom of the heat-conducting clamp (103) to engage with the latitudinal extension rods (301).

3. The tray structure of the ultra-large distillation column as described in claim 2, characterized in that: The positioning steel ring (2) has several connecting holes (201) that penetrate the inner and outer walls. The electric heating plate (3) has two ends, each extending through one of the connecting holes (201) to the outside of the positioning steel ring (2).

4. The tray structure of the ultra-large distillation column as described in claim 3, characterized in that: The inner wall of the positioning steel ring (2) is fixedly connected with a number of reinforcing rings (202), the number of reinforcing rings (202) corresponds to the number of connecting holes (201), and one reinforcing ring (202) surrounds one connecting hole (201).

5. The tray structure of the ultra-large distillation column as described in claim 4, characterized in that: The lower surface of the heating plate (1) has a reinforcing frame (102) surrounding the convection channel (101), the reinforcing frame (102) being adapted to be inserted into the snap-fit ​​channel (501).

6. The tray structure of the ultra-large distillation column as described in claim 5, characterized in that: The inner wall of the snap-fit ​​channel (501) has a limiting frame plate (502) which is suitable for close contact with the lower end of the reinforcing frame (102), and the outer side of the reinforcing frame (102) is in close contact with the inner wall of the snap-fit ​​channel (501).

7. The tray structure of the ultra-large distillation column as described in any one of claims 1 to 6, characterized in that: The lower surface edge of the heat insulation plate (5) has a plug-in plate (503) and a constraint plate (504). The plug-in plate (503) has a pair of through holes (506) for the liquid inlet and liquid outlet of the condenser tube (4) to pass through. The inner side of the constraint plate (504) has an arc groove (507) suitable for engaging with the condenser tube (4).

8. The tray structure of the ultra-large distillation column as described in claim 7, characterized in that: The upper surface edge of the heat insulation plate (5) is provided with a fitting annular groove (505) which is suitable for fitting with the lower end of the positioning steel ring (2).

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